Too firmly. Patented Graph Tech String Saver saddles ease this grip. NEW - Set of 6 Graph Tech String Saver Tunematic Saddles. Saddles are notched. As a string moves and vibrates against a String Saver saddle, a thin Teflon film is created which eases the grip of the saddle on the string and microscopically spreads the stress over a greater portion of the string.
I think they sound really good, but I would say the nut is more important to the overall tone. I almost always use the graphtech nuts. I've been using their nuts and saddles and sting trees for 23-24 yrs now.